JPS61146430A - Holding tool for assembling elemental parts - Google Patents

Abstract

PURPOSE:To produce single structural member having uniform finish dimensional accuracy with high efficiency by providing a frame structure comprised of a frame for holding respective elemental part rigidly and a section for holding the elemental parts each other. CONSTITUTION:A pair of frameworks 20, 30 have approximately face symmetrical jointing face to form a holding cage C having a space surrounding a temporarily assembled work 1. Each framework 20, 30 is comprised of X-inframes 21, 31 forming the profile and sub-frames 22, 32 of desired shape stretched at the inside. The sub-frame 22 of lower framework 20 is provided with a semi- circular holding section 22a and a coarse groove holding section 22g. While the upper framework 30 is provided with semi-circular holding section 32a and groove holding section 32g at the positions corresponding with the holding sections of various shape provided at the lower sub-frame 22 side.

Description

DETAILED DESCRIPTION OF THE INVENTION [11L] The present invention relates to a holder structure for assembling a plurality of component elements into a single structure by welding or the like.

! When a plurality of component elements are combined together and made into a single structure in advance as a temporary assembly by, for example, welding or screw tightening, such a temporary assembly has a particularly complex shape and large volume (volume). However, it is not always easy to carry it in and out during the assembly process and to handle it during work. Moreover, especially when an assembly method by welding is adopted, there is a problem in that the equipment becomes complicated, such as requiring equipment and devices to suppress and correct welding distortion.

In order to solve this problem, there is a method of holding the joints between component elements using a special tool such as a trouble clamp. Furthermore, depending on the shape of the joint, in parts where a special tool such as a trouble clamp cannot be used, a pressing clamping means using, for example, an operating rod of a cylinder device may be used.

The usual method for welding joints between component elements while held by trouble clamps is to first weld one side of the joint, then release the clamp, reverse the joint, and then proceed to welding the other side. In particular, as the size of the structure increases, it is often necessary to release some clamps from the assembly table, which may cause welding distortions such as warping in the temporarily assembled structure of single-sided welded steps. It is troublesome to move on to welding the other side after completing the work to correct the distortion. In addition, when using a pressure clamping means using a cylinder device, a large space is required to install the related equipment that makes up the hydraulic and pneumatic circuit, and a sturdy assembly frame that can withstand the hydraulic and pneumatic operation is required. There is a problem that causes high costs.

The present invention was made in order to solve the problems of the conventional component element assembly method described above, and provides an assembly holder structure in which component elements are efficiently assembled as a single structure with a predetermined assembly accuracy. The purpose is to provide

In order to achieve this objective, in the component element assembly holder structure of the present invention, a subframe is constructed within each main frame of a pair of formworks that are joined by opposing joint surfaces, and the subframes are At corresponding positions, clamping portions are provided which cooperate with each other to clamp the component elements in the joined state of the formwork.

The present invention also provides a structure in which a concave clamping mold made of a cured resin material cured from a fluid state is molded on at least one of the clamping surfaces of any or all of the clamping parts, and a large number of the clamping molds are assembled. The configuration is based on the manufacturing standard type of the body.

Friend-1-1 Hereinafter, a method for assembling parts and elements according to an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, a workpiece 1, which forms part of the body frame of a motorcycle, for example, is assembled into a single structure by several component elements 18 to 1g. Upper and lower pair of formwork 20.3
In the case of the embodiment, 0 has opposing joining surfaces that are symmetrical to the road surface, a space surrounding the outside of the temporarily assembled workpiece 1 to be held inside by joining, and a plurality of joint surfaces that can be seen from the outside. A cage-shaped holder C having an opening is formed. Each formwork 20.30 forms a main frame 21.30 forming an outer shell.
31, and sub-frames 22, 32 of a desired shape built inside these.

One formwork 20 serves as a lower mold for arranging each of the component elements 1a to 1g from a single state to an initial temporary assembly position one by one.
In the sub-frame 22, for example, the portions that engage and support the component element 1a of the tubular body and the component element 1g of the joint 7 flange from below include a semicircular clamping part 22a and an uneven groove clamping part 220. Similarly, component element 1
In the portion where G and 1f are engaged and supported, holding portions for holding each component element are provided, such as holding portions 22a to 22f on the subframe 22. Other component elements and their corresponding clamping portions are labeled with relevant reference numerals.

On the other hand, in the formwork 30 which becomes the upper mold, there are also semi-circular clamping parts on the lower mold side at positions corresponding to the clamping parts of various shapes provided on the sub-frame 22 side of the lower mold, and in pairs. Similarly, semicircular gripping portions 32a and groove gripping portions 32o are provided for the portion 22a and the groove gripping portion 22g.

Note that the pair of clamping parts in the upper and lower sub-frames 22 and 32 are provided in areas that avoid joining parts with other elements that are clamped by both of them, and are used for welding work, etc. between component elements. Care has been taken to ensure that it does not become a hindrance.

Next, each of the holding parts in the sub-frame 22.33 is machined to be larger than the outer periphery and outer shape of the component element.

In these clamping parts, for example, fluid uncured fluid is applied along the clamping surfaces of the clamping parts 228 and 22C shown in FIG. The master structure loaded with the resin material 4 and assembled with tolerances for expected welding distortion is held between the upper and lower formworks 20 and 30, and the resin material 4 is in an uncured state.
It is pressed onto the top, molded to follow the outline of the master structure, and then completely cured.

That is, - As an example, in FIG. 4, X+ in FIG. 2 of the component element 1a is
It is a sectional view taken along the -X+ line, and FIG. 5 is a part element 1d.
, X2-X21 of 1e! FIG. 3 is a cross-sectional view of component elements 1a and Id in concave clamping molds 4a, 4a formed based on the master structure.

1e is fitted and positioned, and the upper and lower holding parts 228
．． It shows the shape in which it is held between groups 32a, 22d, and 32d.

Also, FIG. 6 shows a modification of the mode of molding a flange-shaped component element, 1f or 1g concave clamping mold 4a, in which 7 flange flange parts are formed on the upper and lower subframes 22 and 32 sides as in the embodiment of FIG. 1. if, a concave groove holding portion 22f that directly holds 1g,
32f is not provided, for example, component element 1f is replaced by component element 1.
In order to position the flange surface while avoiding the welded joint circumferential part W with C, the auxiliary jig plate 5 is fastened to the flange-shaped component element 1f with screw bolts 6, and the jig plate 5 in this state is The positioning means is clamped by a pair of clamping parts 22f and 32f via concave clamping molds 4a and 4a. The case shown in FIG. 7 is also a modified form.

In addition, in the above-mentioned embodiments and modified examples, in each case, the concave clamping mold 4a is molded in all of the clamping parts corresponding to each of the component elements 1a to 1g. Depending on the allowable value of positioning accuracy, there may be cases where it is not necessary to provide the concave clamping mold 4a depending on the clamping part.
Furthermore, for the same reason, the concave clamping mold 4a may be provided only in either the upper or lower clamping part.

Next, as shown in Figure 1, the main frame 4 of the formwork 20.30
Positioning pieces 21a and 31a are provided in pairs at corresponding locations on the opposing joint surfaces of 21.31, and the formwork 2
0.30 to have a predetermined overlapping thickness when they are joined together. In addition, in order to prevent the formworks 20 and 30 from shifting in the horizontal direction, retaining pins 7 and locking holes (not shown) are provided on one side and the other side so that they can be engaged when joining. . Furthermore, in order to maintain strong connection between the formworks 20 and 30, connecting members such as trouble clamps 8 are provided at several important points. The coupling member is not limited to the retaining bottle 7 and the trouble clamp 8.

With the formwork 20.30 thus obtained, the component element 1
Each of a to 1g is placed, for example, in a predetermined concave holding die 4a in the subframe 22 of the formwork 20 serving as the lower die, and then the upper formwork 30 is superimposed on the formwork 20 and the retaining bins 7 and When both formworks are connected by the trouble clamp 8, each of the positioned component elements 1a to 1g is held firmly and rigidly by being clamped from both sides.

On the other hand, as shown in FIGS. 8 and 9, the molds 40 and 50 that form a composite type holder using separate cage-shaped image holders C+ and C2 have a structure in which the workpiece 10 is complicated and bulky. This method is used when, in the case of a large-sized product, it is divided into multiple parts and temporarily assembled separately in consideration of assembly work efficiency, and then the two plate assemblies are connected to form a single structure. be done.

That is, the work 10 divided into the work 10a and the work 10B is temporarily assembled and held separately in the formwork 40.50, and in this state, the workpieces 10A and 10B are held separately on the formwork 40.50 side. assembled as a single structure when joined together. However, from the beginning, the formwork was 40.50
It is also possible to temporarily assemble each of the works IOA and 10B in a state where they are joined and integrated, and then take out the work 10 from the formwork 40, 50 when all the connections have been completed.

Each formwork 40.50 has a main frame body 41.51
It is composed of a lid 42.52 which is removable from the main body, and a subframe 43.53 mounted on both the main body 41.51 and the lids 42,52.

Opposite ends of the main frame body 41.51 are made into joint ends 41a, 51a, and one of these joint ends 5
1a is provided with several joint pins 54 protruding, and corresponding joint holes 44 are bored in the other joint end 4'1a, and the tail-proof corresponding joint pins 54 and joint holes 44 are connected to each other. are engaged when both formworks 40 and 50 are joined.

In addition, a pair of buckle-shaped latches that can be locked or released with one touch are provided at the joint ends 41a, 51a so as to maintain the joint state of the molds 40, 50 that engage the joint bin 54 and the joint hole 44. A hook 45 and a hanging pin 55 are provided.

The lids 42 and 52, which can be disassembled from the main frame body 41 and 51, were disassembled in this manner to facilitate workability during assembly, and the main frame body 41 (51)
It is coupled with the set screw 46 (56) or other means.

In addition, as in the structure of the glue 1 and formwork 20.30 in FIG.
Each of the clamping parts a to 1g and those similar to the concave clamping mold 4a are also attached to the workpiece IOA, 1 in the subframe 43.53.
Although they are provided at positions corresponding to the respective component elements of 0B, their explanation will be omitted. However, in FIG. 10, for example, a trouble clamp 11 is shown which is provided on the sub-frame 53 and clamps one of the component elements on the workpiece 10B side.

Next, as an example, an apparatus is constructed in which a cage-shaped image holder C' similar to the above-mentioned cage-shaped holder C is used to hold another work 12 similar to the work 1 and assemble the component elements together by welding. This will be explained with reference to FIG.

A conveyance means is constituted by a workpiece carry-in conveyor 60, a workpiece carry-out conveyor 61, and a transfer conveyor 62 interposed between these two conveyors 60, 61, such as an 0-Ra conveyor. In the feeding direction of the workpiece 12 indicated by arrow X, that is, in the feeding direction of the cage-shaped image holder C', the front end of the carry-in conveyor 60 protrudes and retreats to block or release the conveying path by the operation of the cylinder member 64, and the cage A first stopper 63 is provided against which the mold holder C' abuts and is stopped. A detector 70A, such as a photosensor, is installed near the first stopper 63 to detect the presence or absence of the cage-shaped holder C'. That is, the detection bin 6, such as a bolt, on the detection plate 65 attached to the cage-shaped image holder C'
The detector 70A detects the size, number, or arrangement shape of 6.
is detected, and based on this signal, an operation command corresponding to the 120 types of workpieces is sent from a control circuit (not shown).

Next, the transfer conveyor 62 is movable up and down so as to be connected to or separated from the conveyance path surface of the carry-in/out conveyor 60, 61, receives the cage-shaped image holder C' holding the work 12 from the carry-in conveyor 60, and receives the cage-shaped image holder C' holding the workpiece 12 from the carry-in conveyor 60. When the holder is gripped by the holder gripping means described below, the holder is operated downward from the upper limit position. Further, a second stopper 68 is installed at the front end of the transfer conveyor 62 so that the cage-shaped image holder C' that has been sent abuts and stops and is positioned at that position. The second stopper 68 protrudes and retreats to block or release the conveyance path by actuation of the cylinder member 69. Further, a detector 70B such as a photosensor is provided near the second stopper 68 to detect the presence or absence of the cage-shaped image holder C'. That is, the detector 70B detects that the cage-shaped image holder C' is positioned at a predetermined position, and this detection signal is controlled by the control device to control the cage-shaped image holder C' described below. A chuck (gripping member 71) serving as a gripping means is activated.

Next, in parallel to the transfer conveyor 62,
A large-diameter ring-shaped rotary disk 72 is provided, which together with the chuck member 71 constitutes a gripping mechanism.

This rotation 511172 is caused by the guide roller 7 at several locations on the outer circumference.
3, and is rotated in a vertical plane parallel to the workpiece feeding direction X by the operation of a drive motor 74 that constitutes a positioning mechanism. Further, the inner diameter area of the rotation M72 is larger than the maximum projected area of the work 12 held by the cage-shaped image holder C', and the rotary disk 72 is rotated over the entire area of the work 12 which is a temporary assembly.
Assembly work can be performed from both sides, and welding work can be performed here.

Here, a chuck member 71 is attached to the side surface of the rotary disk 72 to grip and hold the holder C' by operation using a hydraulic pneumatic cylinder system or an electric system, and the holder C' is gripped via the end arm plate 71a. The structure is such that C' is rotated integrally with the rotary disk 72.

On the other hand, a pair of work heads 75, 75, such as robots, are installed so that they can face each other from both sides of the rotary disk 72, that is, from both sides of the vertical plane including the rotary disk 72, and can approach and separate from each other. However, the work head 75.75 is not limited to those intended for welding work; for example, if component elements are mainly connected using bolts and screws, a tightening mechanism called a driver bit etc. may be used. Of course, it is also possible to replace it with a robot equipped with it.

In addition, in the work head 75.75, the cage-shaped holder C
Rotation while holding ′! ! Upon the start of rotation of the workpiece 72, welding work is simultaneously performed from both sides of the rotating workpiece 12 within a predetermined period of time in accordance with an operation command from the control circuit. A detailed explanation of the structure of the working head 75 will be omitted.

Next, a manner of assembling component elements using the cage-shaped holder and device of the above-described embodiment will be explained.

When the control device circuit is powered on, the loading conveyor 6
In this case, the detector 70A detects the presence or absence of the cage-shaped holder C' positioned by the first stopper 63 at 0, in the detection bin 66 on the detection plate 65. The cylinder member 64 uses a control signal based on this detection signal as an operation command.
Then, the first stopper 63 is released from restricting the holding tool C'. At this time, the carry-in conveyor 60 is operated to send out the holder C'.

Next, the cage-shaped holder C' is transferred to the transfer conveyor 62, which is waiting at the same level as the carry-in and carry-out conveyors 60, 61, and is positioned by hitting the second stopper 68. The presence or absence of the holder C' at this position is detected by the detector 70B, and this signal activates the gripping arm plate 71a to grip the cage-shaped holder C' and position it at the center of the rotary disk 72.

When the cage-shaped holder C' is gripped by the chuck member 71, the transfer conveyor 62 moves downward to a standby position where it does not interfere with the rotation of the holder C'.

When a detection means such as a limit switch detects that the transfer conveyor 62 has reached the standby position, an output signal obtained by controlling this detection signal causes the work heads 75, 75 to approach the workpiece 12 from both sides to a predetermined position.

In close proximity to the working head 75, a detection bin 66 on the detection plate 65 as described above is connected to a detector 70.
When A is detected, a control signal based on the type of workpiece 12 programmed in advance is sent, and this controlled output signal causes the welding torch 75a shown in FIG.
, 75a move toward the joining point on the workpiece 12, which is the first work target. Next, welding torch 75a
.

Welding is performed from both sides of the work 12 by means of the weld 75a.

In synchronization with the start of welding work by the welding torches 75a, 75a, an actuation signal is sent to the drive motor 74 to rotate the workpiece 12 in the clockwise direction, for example in the direction of the arrow, and the drive of the motor 74 causes the rotary disk to rotate. 72 is selectively rotated and positioned to a predetermined rotational position.

That is, the rotary disk 72 is rotated according to a program based on welding conditions for welding the joints between component elements at several locations in the workpiece 12, and the welding torch 75a of one work head 75 welds the joints only by a half-circle valve. It is controlled to rotate to the angular position where it finishes sharing. Moreover, a welding torch 75a.

Each of the welds 75a can be welded downward to the welding surface of the joint.

In this way, all the welding connections between component elements in the workpiece 12 are performed while the rotation angle positioning of the rotation 1872 and the movement of the work head 75 satisfy various welding conditions.

When the assembly of the workpiece 11 by welding is completed, the cage-shaped holder C' stops in its original position, and the pair of work heads 75.7
5 retreat from each other and return to their original positions. Next, the transfer conveyor 62 in the lower standby position moves upward to the upper limit position and returns to support and carry the holding holder C from below.

Next, the cage-shaped image holder C' is released from being gripped by the chuck mechanism 71. At this time, the second stopper 68 has already retreated from the conveyance path surface by the operation of the cylinder member 69 and returned to the position where the stopper was released.

In this state, the workpiece 12 assembled as a single structure is carried out together with the cage-shaped image holder C' by the carry-out conveyor 61, and then the workpiece 12 is removed from the cage-shaped image holder C'.
is taken out. That is, the work 12 is a basket-shaped image holder C'
Since each joint is welded all around while being rigidly held by the cage, there is almost no risk of welding distortion such as warping even if the image holder is immediately removed from the cage-shaped image holder C'.

f As can be understood from the above, according to the component element assembly holder structure of the present invention, each of the component elements is rigidly held by the formwork structure of the frame, and in this held state, the component elements are not attached to each other. Since the joints are simultaneously welded from both sides, the welding distortions are balanced, so even when the mold is removed from the formwork after assembly, there is little welding distortion. Therefore, a single structure with constant finished dimensional accuracy can be manufactured efficiently and at low cost.

Moreover, according to the assembly holder structure according to the present invention, since the component elements are basically clamped by the clamping parts, the use of clamping members such as trouble clamps is minimized, and it is easy to assemble the scattered plate. This is preferable because a sufficiently large space can be secured around the body, and the range of movement of a working head such as a welding torch can be expanded.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a mode in which a workpiece is held as a temporary assembly by a cage-shaped image holder, Fig. 2 is a plan view thereof, Fig. 3 is a perspective view of a mode in which cured resin is loaded in a holding part, and Fig. 4 is a vertical cross-sectional view of the concave clamping type according to X+-X+Iil in FIG.
FIG. 5 is a longitudinal cross-sectional view of the concave clamping type taken along the line Xz-x2 in FIG. 2, and FIGS. 6 and 7 are longitudinal cross-sectional views of a modified example of the concave clamping type for a component element having seven flange. , Figures 8 and 9 are exploded perspective views and assembled perspective views of a mode in which workpieces divided by a basket-shaped image holder are held separately as temporary assemblies, and Figure 10 is a troubleshooting example of troubles as a part element holder. FIG. 3 is a perspective view of a state of being held by a clamp. Fig. 11 is a perspective view of a device for assembling workpieces held in a cage-shaped image holder depending on the purpose, and Fig. 12 is an example in which a welding torch is attached to the work head to weld the workpieces from both sides. FIG. 3 is a plan view of the embodiment. Explanation of symbols of main parts 1.10.12... Temporary assembly work 4a...
...Concave clamping type made of cured resin 8.11...
Trouble clamp 20.30 (40,50) ...Formwork (frame) that forms a cage-shaped image holder
71...Chuck mechanism 72...Turnable disc 75...Work head X...Work feed direction Applicant Honda Motor Co., Ltd. Agent Patent attorney Motohiko Fujimura Figure 2 Figure 3 Figure 4 Figure 5

Claims (2)

[Claims] (1) A pair of formworks consisting of a main frame and a subframe installed within the main frame, each having opposing joint surfaces, and the formworks are arranged so that the opposing joint surfaces are in a joined state. A holder for assembling component elements, comprising a connecting means for connecting them to each other, and a holding part that is carried by the subframe and cooperates with each other to clamp the component elements in a state in which the formworks are connected to each other. structure. (2) A pair of formworks each consisting of a main frame and a subframe installed within the main frame, each having opposing joint surfaces, and the formworks are arranged so that the opposing joint surfaces are in a joined state. coupling means for coupling each other;
It has a clamping part that is supported by the sub-frame and cooperates with each other to clamp the component elements when the formwork is connected to each other, and at least one of the clamping surfaces of any or all of the clamping parts is hardened. A holder structure for assembling component elements, characterized in that a concave clamping mold made of a resin material is molded.